- Author: Rud. Fr. Merkel
- Language: German
- Year: 1932
- Author: Else Schubert-Christaller
- Language: German
- Year: 1927
- Author: Gustav Mensching
- Language: German
- Year: 1924
- Author: Rudolf Otto
- Language: German
- Year: 1925
- Author: Hans Schmidt
- Language: German
- Year: 1933
- Author: Gustav Mensching
- Language: German
- Year: 1934
- Author: Carl Clemen
- Language: German
- Year: 1937
- Author: Wilhelm Maurer
- Language: German
- Year: 1930
- Author: Karl Kundsin
- Language: German
- Year: 1929